/*
 * WPA Supplicant - driver interaction with Redpine signals' Wireless LAN drivers 
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 *
 * This file implements a driver interface for the Linux Wireless Extensions.
 * When used with WE-18 or newer, this interface can be used as-is with number
 * of drivers. In addition to this, some of the common functions in this file
 * can be used by other driver interface implementations that use generic WE
 * ioctls, but require private ioctls for some of the functionality.
 */

#include "includes.h"
#include <sys/ioctl.h>
#include <net/if_arp.h>

#include "wireless_copy.h"
#include "common.h"
#include "driver.h"
#include "eloop.h"
#include "priv_netlink.h"
#include "driver_rsi.h"
#include "ieee802_11_defs.h"
#include "wpa_common.h"


static int wpa_driver_rsi_flush_pmkid(void *priv);
static int wpa_driver_rsi_get_range(void *priv);
static void wpa_driver_rsi_finish_drv_init(struct wpa_driver_rsi_data *drv);
static void wpa_driver_rsi_disconnect(struct wpa_driver_rsi_data *drv);


static int wpa_driver_rsi_send_oper_ifla(struct wpa_driver_rsi_data *drv,
                                          int linkmode, int operstate)
{
        struct {
                struct nlmsghdr hdr;
                struct ifinfomsg ifinfo;
                char opts[16];
        } req;
        struct rtattr *rta;
        static int nl_seq;
        ssize_t ret;

        os_memset(&req, 0, sizeof(req));

        req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
        req.hdr.nlmsg_type = RTM_SETLINK;
        req.hdr.nlmsg_flags = NLM_F_REQUEST;
        req.hdr.nlmsg_seq = ++nl_seq;
        req.hdr.nlmsg_pid = 0;

        req.ifinfo.ifi_family = AF_UNSPEC;
        req.ifinfo.ifi_type = 0;
        req.ifinfo.ifi_index = drv->ifindex;
        req.ifinfo.ifi_flags = 0;
        req.ifinfo.ifi_change = 0;

        if (linkmode != -1) {
                rta = aliasing_hide_typecast(
                        ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
                        struct rtattr);
                rta->rta_type = IFLA_LINKMODE;
                rta->rta_len = RTA_LENGTH(sizeof(char));
                *((char *) RTA_DATA(rta)) = linkmode;
                req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
                        RTA_LENGTH(sizeof(char));
        }
        if (operstate != -1) {
                rta = (struct rtattr *)
                        ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
                rta->rta_type = IFLA_OPERSTATE;
                rta->rta_len = RTA_LENGTH(sizeof(char));
                *((char *) RTA_DATA(rta)) = operstate;
                req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
                        RTA_LENGTH(sizeof(char));
        }

        wpa_printf(MSG_DEBUG, "RSI: Operstate: linkmode=%d, operstate=%d",
                   linkmode, operstate);

        ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "RSI: Sending operstate IFLA failed: "
                           "%s (assume operstate is not supported)",
                           strerror(errno));
        }

        return ret < 0 ? -1 : 0;
}


int wpa_driver_rsi_set_auth_param(struct wpa_driver_rsi_data *drv,
                                   int idx, u32 value)
{
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.param.flags = idx & IW_AUTH_INDEX;
        iwr.u.param.value = value;

        if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
                if (errno != EOPNOTSUPP) {
                        wpa_printf(MSG_DEBUG, "RSI: SIOCSIWAUTH(param %d "
                                   "value 0x%x) failed: %s)",
                                   idx, value, strerror(errno));
                }
                ret = errno == EOPNOTSUPP ? -2 : -1;
        }

        return ret;
}


/**
 * wpa_driver_rsi_get_bssid - Get BSSID, SIOCGIWAP
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * @bssid: Buffer for BSSID
 * Returns: 0 on success, -1 on failure
 */
int wpa_driver_rsi_get_bssid(void *priv, u8 *bssid)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);

        if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
                perror("ioctl[SIOCGIWAP]");
                ret = -1;
        }
        os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);

        return ret;
}


/**
 * wpa_driver_rsi_set_bssid - Set BSSID, SIOCSIWAP
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * @bssid: BSSID
 * Returns: 0 on success, -1 on failure
 */
int wpa_driver_rsi_set_bssid(void *priv, const u8 *bssid)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
        if (bssid)
                os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
        else
                os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);

        if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
                perror("ioctl[SIOCSIWAP]");
                ret = -1;
        }

        return ret;
}


/**
 * wpa_driver_rsi_get_ssid - Get SSID, SIOCGIWESSID
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * @ssid: Buffer for the SSID; must be at least 32 bytes long
 * Returns: SSID length on success, -1 on failure
 */
int wpa_driver_rsi_get_ssid(void *priv, u8 *ssid)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.essid.pointer = (caddr_t) ssid;
        iwr.u.essid.length = 32;

        if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
                perror("ioctl[SIOCGIWESSID]");
                ret = -1;
        } else {
                ret = iwr.u.essid.length;
                if (ret > 32)
                        ret = 32;
                /* Some drivers include nul termination in the SSID, so let's
                 * remove it here before further processing. WE-21 changes this
                 * to explicitly require the length _not_ to include nul
                 * termination. */
                if (ret > 0 && ssid[ret - 1] == '\0' &&
                    drv->we_version_compiled < 21)
                        ret--;
        }

        return ret;
}


/**
 * wpa_driver_rsi_set_ssid - Set SSID, SIOCSIWESSID
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * @ssid: SSID
 * @ssid_len: Length of SSID (0..32)
 * Returns: 0 on success, -1 on failure
 */
int wpa_driver_rsi_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;
        char buf[33];

        if (ssid_len > 32)
                return -1;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
        iwr.u.essid.flags = (ssid_len != 0);
        os_memset(buf, 0, sizeof(buf));
        os_memcpy(buf, ssid, ssid_len);
        iwr.u.essid.pointer = (caddr_t) buf;
        if (drv->we_version_compiled < 21) {
                /* For historic reasons, set SSID length to include one extra
                 * character, C string nul termination, even though SSID is
                 * really an octet string that should not be presented as a C
                 * string. Some Linux drivers decrement the length by one and
                 * can thus end up missing the last octet of the SSID if the
                 * length is not incremented here. WE-21 changes this to
                 * explicitly require the length _not_ to include nul
                 * termination. */
                if (ssid_len)
                        ssid_len++;
        }
        iwr.u.essid.length = ssid_len;

        if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
                perror("ioctl[SIOCSIWESSID]");
                ret = -1;
        }

        return ret;
}


/**
 * wpa_driver_rsi_set_freq - Set frequency/channel, SIOCSIWFREQ
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * @freq: Frequency in MHz
 * Returns: 0 on success, -1 on failure
 */
int wpa_driver_rsi_set_freq(void *priv, int freq)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.freq.m = freq * 100000;
        iwr.u.freq.e = 1;

        if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
                perror("ioctl[SIOCSIWFREQ]");
                ret = -1;
        }

        return ret;
}


static void
wpa_driver_rsi_event_wireless_custom(void *ctx, char *custom)
{
        union wpa_event_data data;

        /* wpa_printf(MSG_MSGDUMP, "RSI: Custom wireless event: '%s'",
                   custom); */

        os_memset(&data, 0, sizeof(data));
        /* Host AP driver */
        if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
                data.michael_mic_failure.unicast =
                        os_strstr(custom, " unicast ") != NULL;
                /* TODO: parse parameters(?) */
                wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
        } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
                char *spos;
                int bytes;

                spos = custom + 17;

                bytes = strspn(spos, "0123456789abcdefABCDEF");
                if (!bytes || (bytes & 1))
                        return;
                bytes /= 2;

                data.assoc_info.req_ies = os_malloc(bytes);
                if (data.assoc_info.req_ies == NULL)
                        return;

                data.assoc_info.req_ies_len = bytes;
                hexstr2bin(spos, data.assoc_info.req_ies, bytes);

                spos += bytes * 2;

                data.assoc_info.resp_ies = NULL;
                data.assoc_info.resp_ies_len = 0;

                if (os_strncmp(spos, " RespIEs=", 9) == 0) {
                        spos += 9;

                        bytes = strspn(spos, "0123456789abcdefABCDEF");
                        if (!bytes || (bytes & 1))
                                goto done;
                        bytes /= 2;

                        data.assoc_info.resp_ies = os_malloc(bytes);
                        if (data.assoc_info.resp_ies == NULL)
                                goto done;

                        data.assoc_info.resp_ies_len = bytes;
                        hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
                }

                wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);

        done:
                os_free(data.assoc_info.resp_ies);
                os_free(data.assoc_info.req_ies);
#ifdef CONFIG_PEERKEY
        } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
                if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
                        wpa_printf(MSG_DEBUG, "RSI: unrecognized "
                                   "STKSTART.request '%s'", custom + 17);
                        return;
                }
                wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
#endif /* CONFIG_PEERKEY */
        }
#ifdef CONFIG_CCKM
        else if (os_strncmp(custom, "EVENT_CCKM_REASSOC_RESP", 23) == 0) {
                wpa_printf(MSG_DEBUG, "RSI: Custom wireless event"
                                      "Raised CCKM validate reassoc response event");
                 os_memcpy(&data.cckm_response, custom + 23, sizeof(struct cckm_response));        
                wpa_supplicant_event(ctx, EVENT_CCKM_REASSOC_RESP, &data);
        }
        else if (os_strncmp(custom, "EVENT_CCKM_REASSOC", 18) == 0) {
                wpa_printf(MSG_DEBUG, "RSI: Custom wireless event"
                                      "Raised calculate CCKM MIC request");
                 os_memcpy(&data.cckm_request, custom + 18, sizeof(struct cckm_reassoc));        
                wpa_supplicant_event(ctx, EVENT_CCKM_REASSOC, &data);        
        }
#endif
}

static int wpa_driver_rsi_event_wireless_michaelmicfailure(
        void *ctx, const char *ev, size_t len)
{
        const struct iw_michaelmicfailure *mic;
        union wpa_event_data data;

        if (len < sizeof(*mic))
                return -1;

        mic = (const struct iw_michaelmicfailure *) ev;

        wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
                   "flags=0x%x src_addr=" MACSTR, mic->flags,
                   MAC2STR(mic->src_addr.sa_data));

        os_memset(&data, 0, sizeof(data));
        data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
        wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);

        return 0;
}


static int wpa_driver_rsi_event_wireless_pmkidcand(
        struct wpa_driver_rsi_data *drv, const char *ev, size_t len)
{
        const struct iw_pmkid_cand *cand;
        union wpa_event_data data;
        const u8 *addr;

        if (len < sizeof(*cand))
                return -1;

        cand = (const struct iw_pmkid_cand *) ev;
        addr = (const u8 *) cand->bssid.sa_data;

        wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
                   "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
                   cand->index, MAC2STR(addr));

        os_memset(&data, 0, sizeof(data));
        os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
        data.pmkid_candidate.index = cand->index;
        data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
        wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);

        return 0;
}


static int wpa_driver_rsi_event_wireless_assocreqie(
        struct wpa_driver_rsi_data *drv, const char *ev, int len)
{
        if (len < 0)
                return -1;

        wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
                    len);
        os_free(drv->assoc_req_ies);
        drv->assoc_req_ies = os_malloc(len);
        if (drv->assoc_req_ies == NULL) {
                drv->assoc_req_ies_len = 0;
                return -1;
        }
        os_memcpy(drv->assoc_req_ies, ev, len);
        drv->assoc_req_ies_len = len;

        return 0;
}


static int wpa_driver_rsi_event_wireless_assocrespie(
        struct wpa_driver_rsi_data *drv, const char *ev, int len)
{
        if (len < 0)
                return -1;

        wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
                    len);
        os_free(drv->assoc_resp_ies);
        drv->assoc_resp_ies = os_malloc(len);
        if (drv->assoc_resp_ies == NULL) {
                drv->assoc_resp_ies_len = 0;
                return -1;
        }
        os_memcpy(drv->assoc_resp_ies, ev, len);
        drv->assoc_resp_ies_len = len;

        return 0;
}


static void wpa_driver_rsi_event_assoc_ies(struct wpa_driver_rsi_data *drv)
{
        union wpa_event_data data;

        if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
                return;

        os_memset(&data, 0, sizeof(data));
        if (drv->assoc_req_ies) {
                data.assoc_info.req_ies = drv->assoc_req_ies;
                drv->assoc_req_ies = NULL;
                data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
        }
        if (drv->assoc_resp_ies) {
                data.assoc_info.resp_ies = drv->assoc_resp_ies;
                drv->assoc_resp_ies = NULL;
                data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
        }

        wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);

        os_free(data.assoc_info.req_ies);
        os_free(data.assoc_info.resp_ies);
}


static void wpa_driver_rsi_event_wireless(struct wpa_driver_rsi_data *drv,
                                           void *ctx, char *data, int len)
{
        struct iw_event iwe_buf, *iwe = &iwe_buf;
        char *pos, *end, *custom, *buf;

        pos = data;
        end = data + len;

        while (pos + IW_EV_LCP_LEN <= end) {
                /* Event data may be unaligned, so make a local, aligned copy
                 * before processing. */
                os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
                wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
                           iwe->cmd, iwe->len);
                if (iwe->len <= IW_EV_LCP_LEN)
                        return;

                custom = pos + IW_EV_POINT_LEN;
                if (drv->we_version_compiled > 18 &&
                    (iwe->cmd == IWEVMICHAELMICFAILURE ||
                     iwe->cmd == IWEVCUSTOM ||
                     iwe->cmd == IWEVASSOCREQIE ||
                     iwe->cmd == IWEVASSOCRESPIE ||
                     iwe->cmd == IWEVPMKIDCAND)) {
                        /* WE-19 removed the pointer from struct iw_point */
                        char *dpos = (char *) &iwe_buf.u.data.length;
                        int dlen = dpos - (char *) &iwe_buf;
                        os_memcpy(dpos, pos + IW_EV_LCP_LEN,
                                  sizeof(struct iw_event) - dlen);
                } else {
                        os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
                        custom += IW_EV_POINT_OFF;
                }

                switch (iwe->cmd) {
                case SIOCGIWAP:
                        wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
                                   MACSTR,
                                   MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
                        if (is_zero_ether_addr(
                                    (const u8 *) iwe->u.ap_addr.sa_data) ||
                            os_memcmp(iwe->u.ap_addr.sa_data,
                                      "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
                            0) {
                                os_free(drv->assoc_req_ies);
                                drv->assoc_req_ies = NULL;
                                os_free(drv->assoc_resp_ies);
                                drv->assoc_resp_ies = NULL;
                                wpa_supplicant_event(ctx, EVENT_DISASSOC,
                                                     NULL);
                        
                        } else {
                                wpa_driver_rsi_event_assoc_ies(drv);
                                wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
                        }
                        break;
                case IWEVMICHAELMICFAILURE:
                        if (custom + iwe->u.data.length > end) {
                                wpa_printf(MSG_DEBUG, "RSI: Invalid "
                                           "IWEVMICHAELMICFAILURE length");
                                return;
                        }
                        wpa_driver_rsi_event_wireless_michaelmicfailure(
                                ctx, custom, iwe->u.data.length);
                        break;
                case IWEVCUSTOM:
                        if (custom + iwe->u.data.length > end) {
                                wpa_printf(MSG_DEBUG, "RSI: Invalid "
                                           "IWEVCUSTOM length");
                                return;
                        }
                        buf = os_malloc(iwe->u.data.length + 1);
                        if (buf == NULL)
                                return;
                        os_memcpy(buf, custom, iwe->u.data.length);
                        buf[iwe->u.data.length] = '\0';
                        wpa_driver_rsi_event_wireless_custom(ctx, buf);
                        os_free(buf);
                        break;
                case SIOCGIWSCAN:
                        drv->scan_complete_events = 1;
                        eloop_cancel_timeout(wpa_driver_rsi_scan_timeout,
                                             drv, ctx);
                        wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
                        break;
                case IWEVASSOCREQIE:
                        if (custom + iwe->u.data.length > end) {
                                wpa_printf(MSG_DEBUG, "RSI: Invalid "
                                           "IWEVASSOCREQIE length");
                                return;
                        }
                        wpa_driver_rsi_event_wireless_assocreqie(
                                drv, custom, iwe->u.data.length);
                        break;
                case IWEVASSOCRESPIE:
                        if (custom + iwe->u.data.length > end) {
                                wpa_printf(MSG_DEBUG, "RSI: Invalid "
                                           "IWEVASSOCRESPIE length");
                                return;
                        }
                        wpa_driver_rsi_event_wireless_assocrespie(
                                drv, custom, iwe->u.data.length);
                        break;
                case IWEVPMKIDCAND:
                        if (custom + iwe->u.data.length > end) {
                                wpa_printf(MSG_DEBUG, "RSI: Invalid "
                                           "IWEVPMKIDCAND length");
                                return;
                        }
                        wpa_driver_rsi_event_wireless_pmkidcand(
                                drv, custom, iwe->u.data.length);
                        break;
                }

                pos += iwe->len;
        }
}


static void wpa_driver_rsi_event_link(struct wpa_driver_rsi_data *drv,
                                       void *ctx, char *buf, size_t len,
                                       int del)
{
        union wpa_event_data event;

        os_memset(&event, 0, sizeof(event));
        if (len > sizeof(event.interface_status.ifname))
                len = sizeof(event.interface_status.ifname) - 1;
        os_memcpy(event.interface_status.ifname, buf, len);
        event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
                EVENT_INTERFACE_ADDED;

        wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
                   del ? "DEL" : "NEW",
                   event.interface_status.ifname,
                   del ? "removed" : "added");

        if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
                if (del)
                        drv->if_removed = 1;
                else
                        drv->if_removed = 0;
        }

        wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
}


static int wpa_driver_rsi_own_ifname(struct wpa_driver_rsi_data *drv,
                                      struct nlmsghdr *h)
{
        struct ifinfomsg *ifi;
        int attrlen, nlmsg_len, rta_len;
        struct rtattr *attr;

        ifi = NLMSG_DATA(h);

        nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));

        attrlen = h->nlmsg_len - nlmsg_len;
        if (attrlen < 0)
                return 0;

        attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);

        rta_len = RTA_ALIGN(sizeof(struct rtattr));
        while (RTA_OK(attr, attrlen)) {
                if (attr->rta_type == IFLA_IFNAME) {
                        if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
                            == 0)
                                return 1;
                        else
                                break;
                }
                attr = RTA_NEXT(attr, attrlen);
        }

        return 0;
}


static int wpa_driver_rsi_own_ifindex(struct wpa_driver_rsi_data *drv,
                                       int ifindex, struct nlmsghdr *h)
{
        if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
                return 1;

        if (drv->if_removed && wpa_driver_rsi_own_ifname(drv, h)) {
                drv->ifindex = if_nametoindex(drv->ifname);
                wpa_printf(MSG_DEBUG, "RSI: Update ifindex for a removed "
                           "interface");
                wpa_driver_rsi_finish_drv_init(drv);
                return 1;
        }

        return 0;
}


static void wpa_driver_rsi_event_rtm_newlink(struct wpa_driver_rsi_data *drv,
                                              void *ctx, struct nlmsghdr *h,
                                              size_t len)
{
        struct ifinfomsg *ifi;
        int attrlen, nlmsg_len, rta_len;
        struct rtattr * attr;

        if (len < sizeof(*ifi))
                return;

        ifi = NLMSG_DATA(h);

        if (!wpa_driver_rsi_own_ifindex(drv, ifi->ifi_index, h)) {
                wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
                           ifi->ifi_index);
                return;
        }

        wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
                   "(%s%s%s%s)",
                   drv->operstate, ifi->ifi_flags,
                   (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
                   (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
                   (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
                   (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
        /*
         * Some drivers send the association event before the operup event--in
         * this case, lifting operstate in wpa_driver_rsi_set_operstate()
         * fails. This will hit us when wpa_supplicant does not need to do
         * IEEE 802.1X authentication
         */
        if (drv->operstate == 1 &&
            (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
            !(ifi->ifi_flags & IFF_RUNNING))
                wpa_driver_rsi_send_oper_ifla(drv, -1, IF_OPER_UP);

        nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));

        attrlen = h->nlmsg_len - nlmsg_len;
        if (attrlen < 0)
                return;

        attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);

        rta_len = RTA_ALIGN(sizeof(struct rtattr));
        while (RTA_OK(attr, attrlen)) {
                if (attr->rta_type == IFLA_WIRELESS) {
                        wpa_driver_rsi_event_wireless(
                                drv, ctx, ((char *) attr) + rta_len,
                                attr->rta_len - rta_len);
                } else if (attr->rta_type == IFLA_IFNAME) {
                        wpa_driver_rsi_event_link(drv, ctx,
                                                   ((char *) attr) + rta_len,
                                                   attr->rta_len - rta_len, 0);
                }
                attr = RTA_NEXT(attr, attrlen);
        }
}


static void wpa_driver_rsi_event_rtm_dellink(struct wpa_driver_rsi_data *drv,
                                              void *ctx, struct nlmsghdr *h,
                                              size_t len)
{
        struct ifinfomsg *ifi;
        int attrlen, nlmsg_len, rta_len;
        struct rtattr * attr;

        if (len < sizeof(*ifi))
                return;

        ifi = NLMSG_DATA(h);

        nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));

        attrlen = h->nlmsg_len - nlmsg_len;
        if (attrlen < 0)
                return;

        attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);

        rta_len = RTA_ALIGN(sizeof(struct rtattr));
        while (RTA_OK(attr, attrlen)) {
                if (attr->rta_type == IFLA_IFNAME) {
                        wpa_driver_rsi_event_link(drv,  ctx,
                                                   ((char *) attr) + rta_len,
                                                   attr->rta_len - rta_len, 1);
                }
                attr = RTA_NEXT(attr, attrlen);
        }
}


static void wpa_driver_rsi_event_receive(int sock, void *eloop_ctx,
                                          void *sock_ctx)
{
        char buf[8192];
        int left;
        struct sockaddr_nl from;
        socklen_t fromlen;
        struct nlmsghdr *h;
        int max_events = 10;

try_again:
        fromlen = sizeof(from);
        left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
                        (struct sockaddr *) &from, &fromlen);
        if (left < 0) {
                if (errno != EINTR && errno != EAGAIN)
                        perror("recvfrom(netlink)");
                return;
        }

        h = (struct nlmsghdr *) buf;
        while (left >= (int) sizeof(*h)) {
                int len, plen;

                len = h->nlmsg_len;
                plen = len - sizeof(*h);
                if (len > left || plen < 0) {
                        wpa_printf(MSG_DEBUG, "Malformed netlink message: "
                                   "len=%d left=%d plen=%d",
                                   len, left, plen);
                        break;
                }

                switch (h->nlmsg_type) {
                case RTM_NEWLINK:
                        wpa_driver_rsi_event_rtm_newlink(eloop_ctx, sock_ctx,
                                                          h, plen);
                        break;
                case RTM_DELLINK:
                        wpa_driver_rsi_event_rtm_dellink(eloop_ctx, sock_ctx,
                                                          h, plen);
                        break;
                }

                len = NLMSG_ALIGN(len);
                left -= len;
                h = (struct nlmsghdr *) ((char *) h + len);
        }

        if (left > 0) {
                wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
                           "message", left);
        }

        if (--max_events > 0) {
                /*
                 * Try to receive all events in one eloop call in order to
                 * limit race condition on cases where AssocInfo event, Assoc
                 * event, and EAPOL frames are received more or less at the
                 * same time. We want to process the event messages first
                 * before starting EAPOL processing.
                 */
                goto try_again;
        }
}


static int wpa_driver_rsi_get_ifflags_ifname(struct wpa_driver_rsi_data *drv,
                                              const char *ifname, int *flags)
{
        struct ifreq ifr;

        os_memset(&ifr, 0, sizeof(ifr));
        os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
        if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
                perror("ioctl[SIOCGIFFLAGS]");
                return -1;
        }
        *flags = ifr.ifr_flags & 0xffff;
        return 0;
}


/**
 * wpa_driver_rsi_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 * @drv: driver_rsi private data
 * @flags: Pointer to returned flags value
 * Returns: 0 on success, -1 on failure
 */
int wpa_driver_rsi_get_ifflags(struct wpa_driver_rsi_data *drv, int *flags)
{
        return wpa_driver_rsi_get_ifflags_ifname(drv, drv->ifname, flags);
}


static int wpa_driver_rsi_set_ifflags_ifname(struct wpa_driver_rsi_data *drv,
                                              const char *ifname, int flags)
{
        struct ifreq ifr;

        os_memset(&ifr, 0, sizeof(ifr));
        os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
        ifr.ifr_flags = flags & 0xffff;
        if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
                perror("SIOCSIFFLAGS");
                return -1;
        }
        return 0;
}


/**
 * wpa_driver_rsi_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 * @drv: driver_rsi private data
 * @flags: New value for flags
 * Returns: 0 on success, -1 on failure
 */
int wpa_driver_rsi_set_ifflags(struct wpa_driver_rsi_data *drv, int flags)
{
        return wpa_driver_rsi_set_ifflags_ifname(drv, drv->ifname, flags);
}


/**
 * wpa_driver_rsi_init - Initialize WE driver interface
 * @ctx: context to be used when calling wpa_supplicant functions,
 * e.g., wpa_supplicant_event()
 * @ifname: interface name, e.g., wlan0
 * Returns: Pointer to private data, %NULL on failure
 */
void * wpa_driver_rsi_init(void *ctx, const char *ifname)
{
        int s;
        struct sockaddr_nl local;
        struct wpa_driver_rsi_data *drv;

        drv = os_zalloc(sizeof(*drv));
        if (drv == NULL)
                return NULL;
        drv->ctx = ctx;
        os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));

        drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
        if (drv->ioctl_sock < 0) {
                perror("socket(PF_INET,SOCK_DGRAM)");
                os_free(drv);
                return NULL;
        }

        s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
        if (s < 0) {
                perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
                close(drv->ioctl_sock);
                os_free(drv);
                return NULL;
        }

        os_memset(&local, 0, sizeof(local));
        local.nl_family = AF_NETLINK;
        local.nl_groups = RTMGRP_LINK;
        if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
                perror("bind(netlink)");
                close(s);
                close(drv->ioctl_sock);
                os_free(drv);
                return NULL;
        }

        eloop_register_read_sock(s, wpa_driver_rsi_event_receive, drv, ctx);
        drv->event_sock = s;

        drv->mlme_sock = -1;

        wpa_driver_rsi_finish_drv_init(drv);

        return drv;
}


static void wpa_driver_rsi_finish_drv_init(struct wpa_driver_rsi_data *drv)
{
        int flags;

        if (wpa_driver_rsi_get_ifflags(drv, &flags) != 0)
                printf("Could not get interface '%s' flags\n", drv->ifname);
        else if (!(flags & IFF_UP)) {
                if (wpa_driver_rsi_set_ifflags(drv, flags | IFF_UP) != 0) {
                        printf("Could not set interface '%s' UP\n",
                               drv->ifname);
                } else {
                        /*
                         * Wait some time to allow driver to initialize before
                         * starting configuring the driver. This seems to be
                         * needed at least some drivers that load firmware etc.
                         * when the interface is set up.
                         */
                        wpa_printf(MSG_DEBUG, "Interface %s set UP - waiting "
                                   "a second for the driver to complete "
                                   "initialization", drv->ifname);
                        sleep(1);
                }
        }

        /*
         * Make sure that the driver does not have any obsolete PMKID entries.
         */
        wpa_driver_rsi_flush_pmkid(drv);

        if (wpa_driver_rsi_set_mode(drv, 0) < 0) {
                printf("Could not configure driver to use managed mode\n");
        }

        wpa_driver_rsi_get_range(drv);

        /*
         * Unlock the driver's BSSID and force to a random SSID to clear any
         * previous association the driver might have when the supplicant
         * starts up.
         */
        wpa_driver_rsi_disconnect(drv);

        drv->ifindex = if_nametoindex(drv->ifname);

        if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
                /*
                 * Host AP driver may use both wlan# and wifi# interface in
                 * wireless events. Since some of the versions included WE-18
                 * support, let's add the alternative ifindex also from
                 * driver_rsi.c for the time being. This may be removed at
                 * some point once it is believed that old versions of the
                 * driver are not in use anymore.
                 */
                char ifname2[IFNAMSIZ + 1];
                os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
                os_memcpy(ifname2, "wifi", 4);
                wpa_driver_rsi_alternative_ifindex(drv, ifname2);
        }

        wpa_driver_rsi_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
}


/**
 * wpa_driver_rsi_deinit - Deinitialize WE driver interface
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 *
 * Shut down driver interface and processing of driver events. Free
 * private data buffer if one was allocated in wpa_driver_rsi_init().
 */
void wpa_driver_rsi_deinit(void *priv)
{
        struct wpa_driver_rsi_data *drv = priv;
        int flags;

        eloop_cancel_timeout(wpa_driver_rsi_scan_timeout, drv, drv->ctx);

        /*
         * Clear possibly configured driver parameters in order to make it
         * easier to use the driver after wpa_supplicant has been terminated.
         */
        wpa_driver_rsi_disconnect(drv);

        wpa_driver_rsi_send_oper_ifla(priv, 0, IF_OPER_UP);

        eloop_unregister_read_sock(drv->event_sock);
        if (drv->mlme_sock >= 0)
                eloop_unregister_read_sock(drv->mlme_sock);

        if (wpa_driver_rsi_get_ifflags(drv, &flags) == 0)
                (void) wpa_driver_rsi_set_ifflags(drv, flags & ~IFF_UP);

        close(drv->event_sock);
        close(drv->ioctl_sock);
        if (drv->mlme_sock >= 0)
                close(drv->mlme_sock);
        os_free(drv->assoc_req_ies);
        os_free(drv->assoc_resp_ies);
        os_free(drv);
}


/**
 * wpa_driver_rsi_scan_timeout - Scan timeout to report scan completion
 * @eloop_ctx: Unused
 * @timeout_ctx: ctx argument given to wpa_driver_rsi_init()
 *
 * This function can be used as registered timeout when starting a scan to
 * generate a scan completed event if the driver does not report this.
 */
void wpa_driver_rsi_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
        wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
        wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
}


/**
 * wpa_driver_rsi_scan - Request the driver to initiate scan
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
 *        all SSIDs (either active scan with broadcast SSID or passive
 *        scan
 * @ssid_len: Length of the SSID
 * Returns: 0 on success, -1 on failure
 */
int wpa_driver_rsi_scan(void *priv, const u8 *ssid, size_t ssid_len)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0, timeout;
        struct iw_scan_req req;

        if (ssid_len > IW_ESSID_MAX_SIZE) {
                wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
                           __FUNCTION__, (unsigned long) ssid_len);
                return -1;
        }

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);

        if (ssid && ssid_len) {
                os_memset(&req, 0, sizeof(req));
                req.essid_len = ssid_len;
                req.bssid.sa_family = ARPHRD_ETHER;
                os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
                os_memcpy(req.essid, ssid, ssid_len);
                iwr.u.data.pointer = (caddr_t) &req;
                iwr.u.data.length = sizeof(req);
                iwr.u.data.flags = IW_SCAN_THIS_ESSID;
        }

        if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
                perror("ioctl[SIOCSIWSCAN]");
                ret = -1;
        }

        /* Not all drivers generate "scan completed" wireless event, so try to
         * read results after a timeout. */
        timeout = 20;
        if (drv->scan_complete_events) {
                /*
                 * The driver seems to deliver SIOCGIWSCAN events to notify
                 * when scan is complete, so use longer timeout to avoid race
                 * conditions with scanning and following association request.
                 */
                timeout = 30;
        }
        wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
                   "seconds", ret, timeout);
        eloop_cancel_timeout(wpa_driver_rsi_scan_timeout, drv, drv->ctx);
        eloop_register_timeout(timeout, 0, wpa_driver_rsi_scan_timeout, drv,
                               drv->ctx);

        return ret;
}


static u8 * wpa_driver_rsi_giwscan(struct wpa_driver_rsi_data *drv,
                                    size_t *len)
{
        struct iwreq iwr;
        u8 *res_buf;
        size_t res_buf_len;

        res_buf_len = IW_SCAN_MAX_DATA;
        for (;;) {
                res_buf = os_malloc(res_buf_len);
                if (res_buf == NULL)
                        return NULL;
                os_memset(&iwr, 0, sizeof(iwr));
                os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
                iwr.u.data.pointer = res_buf;
                iwr.u.data.length = res_buf_len;

                if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
                        break;

                if (errno == E2BIG && res_buf_len < 65535) {
                        os_free(res_buf);
                        res_buf = NULL;
                        res_buf_len *= 2;
                        if (res_buf_len > 65535)
                                res_buf_len = 65535; /* 16-bit length field */
                        wpa_printf(MSG_DEBUG, "Scan results did not fit - "
                                   "trying larger buffer (%lu bytes)",
                                   (unsigned long) res_buf_len);
                } else {
                        perror("ioctl[SIOCGIWSCAN]");
                        os_free(res_buf);
                        return NULL;
                }
        }

        if (iwr.u.data.length > res_buf_len) {
                os_free(res_buf);
                return NULL;
        }
        *len = iwr.u.data.length;

        return res_buf;
}


/*
 * Data structure for collecting RSI scan results. This is needed to allow
 * the various methods of reporting IEs to be combined into a single IE buffer.
 */
struct rsi_scan_data {
        struct wpa_scan_res res;
        u8 *ie;
        size_t ie_len;
        u8 ssid[32];
        size_t ssid_len;
        int maxrate;
};


static void rsi_get_scan_mode(struct iw_event *iwe,
                               struct rsi_scan_data *res)
{
        if (iwe->u.mode == IW_MODE_ADHOC)
                res->res.caps |= IEEE80211_CAP_IBSS;
        else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
                res->res.caps |= IEEE80211_CAP_ESS;
}


static void rsi_get_scan_ssid(struct iw_event *iwe,
                               struct rsi_scan_data *res, char *custom,
                               char *end)
{
        int ssid_len = iwe->u.essid.length;
        if (custom + ssid_len > end)
                return;
        if (iwe->u.essid.flags &&
            ssid_len > 0 &&
            ssid_len <= IW_ESSID_MAX_SIZE) {
                os_memcpy(res->ssid, custom, ssid_len);
                res->ssid_len = ssid_len;
        }
}


static void rsi_get_scan_freq(struct iw_event *iwe,
                               struct rsi_scan_data *res)
{
        int divi = 1000000, i;

        if (iwe->u.freq.e == 0) {
                /*
                 * Some drivers do not report frequency, but a channel.
                 * Try to map this to frequency by assuming they are using
                 * IEEE 802.11b/g.  But don't overwrite a previously parsed
                 * frequency if the driver sends both frequency and channel,
                 * since the driver may be sending an A-band channel that we
                 * don't handle here.
                 */

                if (res->res.freq)
                        return;

                if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
                        res->res.freq = 2407 + 5 * iwe->u.freq.m;
                        return;
                } else if (iwe->u.freq.m == 14) {
                        res->res.freq = 2484;
                        return;
                }
        }

        if (iwe->u.freq.e > 6) {
                wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
                           MACSTR " m=%d e=%d)",
                           MAC2STR(res->res.bssid), iwe->u.freq.m,
                           iwe->u.freq.e);
                return;
        }

        for (i = 0; i < iwe->u.freq.e; i++)
                divi /= 10;
        res->res.freq = iwe->u.freq.m / divi;
}


static void rsi_get_scan_qual(struct iw_event *iwe,
                               struct rsi_scan_data *res)
{
        res->res.qual = iwe->u.qual.qual;
        res->res.noise = iwe->u.qual.noise;
        res->res.level = (0x100 - iwe->u.qual.level);
}


static void rsi_get_scan_encode(struct iw_event *iwe,
                                 struct rsi_scan_data *res)
{
        if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
                res->res.caps |= IEEE80211_CAP_PRIVACY;
}


static void rsi_get_scan_rate(struct iw_event *iwe,
                               struct rsi_scan_data *res, char *pos,
                               char *end)
{
        int maxrate;
        char *custom = pos + IW_EV_LCP_LEN;
        struct iw_param p;
        size_t clen;

        clen = iwe->len;
        if (custom + clen > end)
                return;
        maxrate = 0;
        while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
                /* Note: may be misaligned, make a local, aligned copy */
                os_memcpy(&p, custom, sizeof(struct iw_param));
                if (p.value > maxrate)
                        maxrate = p.value;
                clen -= sizeof(struct iw_param);
                custom += sizeof(struct iw_param);
        }

        /* Convert the maxrate from WE-style (b/s units) to
         * 802.11 rates (500000 b/s units).
         */
        res->maxrate = maxrate / 500000;
}


static void rsi_get_scan_iwevgenie(struct iw_event *iwe,
                                    struct rsi_scan_data *res, char *custom,
                                    char *end)
{
        char *genie, *gpos, *gend;
        u8 *tmp;

        if (iwe->u.data.length == 0)
                return;

        gpos = genie = custom;
        gend = genie + iwe->u.data.length;
        if (gend > end) {
                wpa_printf(MSG_INFO, "IWEVGENIE overflow");
                return;
        }

        tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
        if (tmp == NULL)
                return;
        os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
        res->ie = tmp;
        res->ie_len += gend - gpos;
}


static void rsi_get_scan_custom(struct iw_event *iwe,
                                 struct rsi_scan_data *res, char *custom,
                                 char *end)
{
        size_t clen;
        u8 *tmp;

        clen = iwe->u.data.length;
        if (custom + clen > end)
                return;

        if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
                char *spos;
                int bytes;
                spos = custom + 7;
                bytes = custom + clen - spos;
                if (bytes & 1 || bytes == 0)
                        return;
                bytes /= 2;
                tmp = os_realloc(res->ie, res->ie_len + bytes);
                if (tmp == NULL)
                        return;
                hexstr2bin(spos, tmp + res->ie_len, bytes);
                res->ie = tmp;
                res->ie_len += bytes;
        } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
                char *spos;
                int bytes;
                spos = custom + 7;
                bytes = custom + clen - spos;
                if (bytes & 1 || bytes == 0)
                        return;
                bytes /= 2;
                tmp = os_realloc(res->ie, res->ie_len + bytes);
                if (tmp == NULL)
                        return;
                hexstr2bin(spos, tmp + res->ie_len, bytes);
                res->ie = tmp;
                res->ie_len += bytes;
        } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
                char *spos;
                int bytes;
                u8 bin[8];
                spos = custom + 4;
                bytes = custom + clen - spos;
                if (bytes != 16) {
                        wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
                        return;
                }
                bytes /= 2;
                hexstr2bin(spos, bin, bytes);
                res->res.tsf += WPA_GET_BE64(bin);
        }
}


static int rsi_19_iw_point(struct wpa_driver_rsi_data *drv, u16 cmd)
{
        return drv->we_version_compiled > 18 &&
                (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
                 cmd == IWEVGENIE || cmd == IWEVCUSTOM);
}


static void wpa_driver_rsi_add_scan_entry(struct wpa_scan_results *res,
                                           struct rsi_scan_data *data)
{
        struct wpa_scan_res **tmp;
        struct wpa_scan_res *r;
        size_t extra_len;
        u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;

        /* Figure out whether we need to fake any IEs */
        pos = data->ie;
        end = pos + data->ie_len;
        while (pos && pos + 1 < end) {
                if (pos + 2 + pos[1] > end)
                        break;
                if (pos[0] == WLAN_EID_SSID)
                        ssid_ie = pos;
                else if (pos[0] == WLAN_EID_SUPP_RATES)
                        rate_ie = pos;
                else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
                        rate_ie = pos;
                pos += 2 + pos[1];
        }

        extra_len = 0;
        if (ssid_ie == NULL)
                extra_len += 2 + data->ssid_len;
        if (rate_ie == NULL && data->maxrate)
                extra_len += 3;

        r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
        if (r == NULL)
                return;
        os_memcpy(r, &data->res, sizeof(*r));
        r->ie_len = extra_len + data->ie_len;
        pos = (u8 *) (r + 1);
        if (ssid_ie == NULL) {
                /*
                 * Generate a fake SSID IE since the driver did not report
                 * a full IE list.
                 */
                *pos++ = WLAN_EID_SSID;
                *pos++ = data->ssid_len;
                os_memcpy(pos, data->ssid, data->ssid_len);
                pos += data->ssid_len;
        }
        if (rate_ie == NULL && data->maxrate) {
                /*
                 * Generate a fake Supported Rates IE since the driver did not
                 * report a full IE list.
                 */
                *pos++ = WLAN_EID_SUPP_RATES;
                *pos++ = 1;
                *pos++ = data->maxrate;
        }
        if (data->ie)
                os_memcpy(pos, data->ie, data->ie_len);

        tmp = os_realloc(res->res,
                         (res->num + 1) * sizeof(struct wpa_scan_res *));
        if (tmp == NULL) {
                os_free(r);
                return;
        }
        tmp[res->num++] = r;
        res->res = tmp;
}
                                      

/**
 * wpa_driver_rsi_get_scan_results - Fetch the latest scan results
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * Returns: Scan results on success, -1 on failure
 */
struct wpa_scan_results * wpa_driver_rsi_get_scan_results(void *priv)
{
        struct wpa_driver_rsi_data *drv = priv;
        size_t ap_num = 0, len;
        int first;
        u8 *res_buf;
        struct iw_event iwe_buf, *iwe = &iwe_buf;
        char *pos, *end, *custom;
        struct wpa_scan_results *res;
        struct rsi_scan_data data;

        res_buf = wpa_driver_rsi_giwscan(drv, &len);
        if (res_buf == NULL)
                return NULL;

        ap_num = 0;
        first = 1;

        res = os_zalloc(sizeof(*res));
        if (res == NULL) {
                os_free(res_buf);
                return NULL;
        }

        pos = (char *) res_buf;
        end = (char *) res_buf + len;
        os_memset(&data, 0, sizeof(data));

        while (pos + IW_EV_LCP_LEN <= end) {
                /* Event data may be unaligned, so make a local, aligned copy
                 * before processing. */
                os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
                if (iwe->len <= IW_EV_LCP_LEN)
                        break;

                custom = pos + IW_EV_POINT_LEN;
                if (rsi_19_iw_point(drv, iwe->cmd)) {
                        /* WE-19 removed the pointer from struct iw_point */
                        char *dpos = (char *) &iwe_buf.u.data.length;
                        int dlen = dpos - (char *) &iwe_buf;
                        os_memcpy(dpos, pos + IW_EV_LCP_LEN,
                                  sizeof(struct iw_event) - dlen);
                } else {
                        os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
                        custom += IW_EV_POINT_OFF;
                }

                switch (iwe->cmd) {
                case SIOCGIWAP:
                        if (!first)
                                wpa_driver_rsi_add_scan_entry(res, &data);
                        first = 0;
                        os_free(data.ie);
                        os_memset(&data, 0, sizeof(data));
                        os_memcpy(data.res.bssid,
                                  iwe->u.ap_addr.sa_data, ETH_ALEN);
                        break;
                case SIOCGIWMODE:
                        rsi_get_scan_mode(iwe, &data);
                        break;
                case SIOCGIWESSID:
                        rsi_get_scan_ssid(iwe, &data, custom, end);
                        break;
                case SIOCGIWFREQ:
                        rsi_get_scan_freq(iwe, &data);
                        break;
                case IWEVQUAL:
                        rsi_get_scan_qual(iwe, &data);
                        break;
                case SIOCGIWENCODE:
                        rsi_get_scan_encode(iwe, &data);
                        break;
                case SIOCGIWRATE:
                        rsi_get_scan_rate(iwe, &data, pos, end);
                        break;
                case IWEVGENIE:
                        rsi_get_scan_iwevgenie(iwe, &data, custom, end);
                        break;
                case IWEVCUSTOM:
                        rsi_get_scan_custom(iwe, &data, custom, end);
                        break;
                }

                pos += iwe->len;
        }
        os_free(res_buf);
        res_buf = NULL;
        if (!first)
                wpa_driver_rsi_add_scan_entry(res, &data);
        os_free(data.ie);

        wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
                   (unsigned long) len, (unsigned long) res->num);

        return res;
}


static int wpa_driver_rsi_get_range(void *priv)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iw_range *range;
        struct iwreq iwr;
        int minlen;
        size_t buflen;

        /*
         * Use larger buffer than struct iw_range in order to allow the
         * structure to grow in the future.
         */
        buflen = sizeof(struct iw_range) + 500;
        range = os_zalloc(buflen);
        if (range == NULL)
                return -1;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.data.pointer = (caddr_t) range;
        iwr.u.data.length = buflen;

        minlen = ((char *) &range->enc_capa) - (char *) range +
                sizeof(range->enc_capa);

        if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
                perror("ioctl[SIOCGIWRANGE]");
                os_free(range);
                return -1;
        } else if (iwr.u.data.length >= minlen &&
                   range->we_version_compiled >= 18) {
                wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
                           "WE(source)=%d enc_capa=0x%x",
                           range->we_version_compiled,
                           range->we_version_source,
                           range->enc_capa);
                drv->has_capability = 1;
                drv->we_version_compiled = range->we_version_compiled;
                if (range->enc_capa & IW_ENC_CAPA_WPA) {
                        drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
                                WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
                }
                if (range->enc_capa & IW_ENC_CAPA_WPA2) {
                        drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
                                WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
                }
                drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
                        WPA_DRIVER_CAPA_ENC_WEP104;
                if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
                        drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
                if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
                        drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
                if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
                        drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
                drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
                        WPA_DRIVER_AUTH_SHARED |
                        WPA_DRIVER_AUTH_LEAP;

                wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x "
                           "flags 0x%x",
                           drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
        } else {
                wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
                           "assuming WPA is not supported");
        }

        os_free(range);
        return 0;
}


static int wpa_driver_rsi_set_wpa(void *priv, int enabled)
{
        struct wpa_driver_rsi_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);

        return wpa_driver_rsi_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
                                              enabled);
}


static int wpa_driver_rsi_set_psk(struct wpa_driver_rsi_data *drv,
                                   const u8 *psk)
{
        struct iw_encode_ext *ext;
        struct iwreq iwr;
        int ret;

        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
                return 0;

        if (!psk)
                return 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);

        ext = os_zalloc(sizeof(*ext) + PMK_LEN);
        if (ext == NULL)
                return -1;

        iwr.u.encoding.pointer = (caddr_t) ext;
        iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
        ext->key_len = PMK_LEN;
        os_memcpy(&ext->key, psk, ext->key_len);
        ext->alg = IW_ENCODE_ALG_PMK;

        ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
        if (ret < 0)
                perror("ioctl[SIOCSIWENCODEEXT] PMK");
        os_free(ext);

        return ret;
}


static int wpa_driver_rsi_set_key_ext(void *priv, wpa_alg alg,
                                       const u8 *addr, int key_idx,
                                       int set_tx, const u8 *seq,
                                       size_t seq_len,
                                       const u8 *key, size_t key_len)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;
        struct iw_encode_ext *ext;

        if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
                wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
                           __FUNCTION__, (unsigned long) seq_len);
                return -1;
        }

        ext = os_zalloc(sizeof(*ext) + key_len);
        if (ext == NULL)
                return -1;
        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.encoding.flags = key_idx + 1;
        iwr.u.encoding.flags |= IW_ENCODE_TEMP;
        if (alg == WPA_ALG_NONE)
                iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
        iwr.u.encoding.pointer = (caddr_t) ext;
        iwr.u.encoding.length = sizeof(*ext) + key_len;

        if (addr == NULL ||
            os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
                ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
        if (set_tx)
                ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;

        ext->addr.sa_family = ARPHRD_ETHER;
        if (addr)
                os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
        else
                os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
        if (key && key_len) {
                os_memcpy(ext + 1, key, key_len);
                ext->key_len = key_len;
        }
        switch (alg) {
        case WPA_ALG_NONE:
                ext->alg = IW_ENCODE_ALG_NONE;
                break;
        case WPA_ALG_WEP:
                ext->alg = IW_ENCODE_ALG_WEP;
                break;
        case WPA_ALG_TKIP:
                ext->alg = IW_ENCODE_ALG_TKIP;
                break;
        case WPA_ALG_CCMP:
                ext->alg = IW_ENCODE_ALG_CCMP;
                break;
        case WPA_ALG_PMK:
                ext->alg = IW_ENCODE_ALG_PMK;
                break;
#ifdef CONFIG_IEEE80211W
        case WPA_ALG_IGTK:
                ext->alg = IW_ENCODE_ALG_AES_CMAC;
                break;
#endif /* CONFIG_IEEE80211W */
        default:
                wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
                           __FUNCTION__, alg);
                os_free(ext);
                return -1;
        }

        if (seq && seq_len) {
                ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
                os_memcpy(ext->rx_seq, seq, seq_len);
        }

        if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
                ret = errno == EOPNOTSUPP ? -2 : -1;
                if (errno == ENODEV) {
                        /*
                         * ndiswrapper seems to be returning incorrect error
                         * code.. */
                        ret = -2;
                }

                perror("ioctl[SIOCSIWENCODEEXT]");
        }

        os_free(ext);
        return ret;
}


/**
 * wpa_driver_rsi_set_key - Configure encryption key
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * @priv: Private driver interface data
 * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
 *        %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
 * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
 *        broadcast/default keys
 * @key_idx: key index (0..3), usually 0 for unicast keys
 * @set_tx: Configure this key as the default Tx key (only used when
 *        driver does not support separate unicast/individual key
 * @seq: Sequence number/packet number, seq_len octets, the next
 *        packet number to be used for in replay protection; configured
 *        for Rx keys (in most cases, this is only used with broadcast
 *        keys and set to zero for unicast keys)
 * @seq_len: Length of the seq, depends on the algorithm:
 *        TKIP: 6 octets, CCMP: 6 octets
 * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
 *        8-byte Rx Mic Key
 * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
 *        TKIP: 32, CCMP: 16)
 * Returns: 0 on success, -1 on failure
 *
 * This function uses SIOCSIWENCODEEXT by default, but tries to use
 * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
 */
int wpa_driver_rsi_set_key(void *priv, wpa_alg alg,
                            const u8 *addr, int key_idx,
                            int set_tx, const u8 *seq, size_t seq_len,
                            const u8 *key, size_t key_len)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
                   "key_len=%lu",
                   __FUNCTION__, alg, key_idx, set_tx,
                   (unsigned long) seq_len, (unsigned long) key_len);

        ret = wpa_driver_rsi_set_key_ext(drv, alg, addr, key_idx, set_tx,
                                          seq, seq_len, key, key_len);
        if (ret == 0)
                return 0;

        if (ret == -2 &&
            (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
                wpa_printf(MSG_DEBUG, "Driver did not support "
                           "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
                ret = 0;
        } else {
                wpa_printf(MSG_DEBUG, "Driver did not support "
                           "SIOCSIWENCODEEXT");
                return ret;
        }

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.encoding.flags = key_idx + 1;
        iwr.u.encoding.flags |= IW_ENCODE_TEMP;
        if (alg == WPA_ALG_NONE)
                iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
        iwr.u.encoding.pointer = (caddr_t) key;
        iwr.u.encoding.length = key_len;

        if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
                perror("ioctl[SIOCSIWENCODE]");
                ret = -1;
        }

        if (set_tx && alg != WPA_ALG_NONE) {
                os_memset(&iwr, 0, sizeof(iwr));
                os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
                iwr.u.encoding.flags = key_idx + 1;
                iwr.u.encoding.flags |= IW_ENCODE_TEMP;
                iwr.u.encoding.pointer = (caddr_t) NULL;
                iwr.u.encoding.length = 0;
                if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
                        perror("ioctl[SIOCSIWENCODE] (set_tx)");
                        ret = -1;
                }
        }

        return ret;
}


static int wpa_driver_rsi_set_countermeasures(void *priv,
                                               int enabled)
{
        struct wpa_driver_rsi_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
        return wpa_driver_rsi_set_auth_param(drv,
                                              IW_AUTH_TKIP_COUNTERMEASURES,
                                              enabled);
}


static int wpa_driver_rsi_set_drop_unencrypted(void *priv,
                                                int enabled)
{
        struct wpa_driver_rsi_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
        drv->use_crypt = enabled;
        return wpa_driver_rsi_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
                                              enabled);
}


static int wpa_driver_rsi_mlme(struct wpa_driver_rsi_data *drv,
                                const u8 *addr, int cmd, int reason_code)
{
        struct iwreq iwr;
        struct iw_mlme mlme;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        os_memset(&mlme, 0, sizeof(mlme));
        mlme.cmd = cmd;
        mlme.reason_code = reason_code;
        mlme.addr.sa_family = ARPHRD_ETHER;
        os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
        iwr.u.data.pointer = (caddr_t) &mlme;
        iwr.u.data.length = sizeof(mlme);

        if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
                perror("ioctl[SIOCSIWMLME]");
                ret = -1;
        }

        return ret;
}


static void wpa_driver_rsi_disconnect(struct wpa_driver_rsi_data *drv)
{
        struct iwreq iwr;
        const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
        u8 ssid[32];
        int i;

        /*
         * Only force-disconnect when the card is in infrastructure mode,
         * otherwise the driver might interpret the cleared BSSID and random
         * SSID as an attempt to create a new ad-hoc network.
         */
        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
                perror("ioctl[SIOCGIWMODE]");
                iwr.u.mode = IW_MODE_INFRA;
        }

        if (iwr.u.mode == IW_MODE_INFRA) {
                /*
                 * Clear the BSSID selection and set a random SSID to make sure
                 * the driver will not be trying to associate with something
                 * even if it does not understand SIOCSIWMLME commands (or
                 * tries to associate automatically after deauth/disassoc).
                 */
                wpa_driver_rsi_set_bssid(drv, null_bssid);

                for (i = 0; i < 32; i++)
                        ssid[i] = rand() & 0xFF;
                wpa_driver_rsi_set_ssid(drv, ssid, 32);
        }
}


static int wpa_driver_rsi_deauthenticate(void *priv, const u8 *addr,
                                          int reason_code)
{
        struct wpa_driver_rsi_data *drv = priv;
        int ret;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
        ret = wpa_driver_rsi_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
        wpa_driver_rsi_disconnect(drv);
        return ret;
}


static int wpa_driver_rsi_disassociate(void *priv, const u8 *addr,
                                        int reason_code)
{
        struct wpa_driver_rsi_data *drv = priv;
        int ret;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
        ret = wpa_driver_rsi_mlme(drv, addr, IW_MLME_DISASSOC, reason_code);
        wpa_driver_rsi_disconnect(drv);
        return ret;
}


static int wpa_driver_rsi_set_gen_ie(void *priv, const u8 *ie,
                                      size_t ie_len)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.data.pointer = (caddr_t) ie;
        iwr.u.data.length = ie_len;

        if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
                perror("ioctl[SIOCSIWGENIE]");
                ret = -1;
        }

        return ret;
}


int wpa_driver_rsi_cipher2rsi(int cipher)
{
        switch (cipher) {
        case CIPHER_NONE:
                return IW_AUTH_CIPHER_NONE;
        case CIPHER_WEP40:
                return IW_AUTH_CIPHER_WEP40;
        case CIPHER_TKIP:
                return IW_AUTH_CIPHER_TKIP;
        case CIPHER_CCMP:
                return IW_AUTH_CIPHER_CCMP;
        case CIPHER_WEP104:
                return IW_AUTH_CIPHER_WEP104;
        default:
                return 0;
        }
}


int wpa_driver_rsi_keymgmt2rsi(int keymgmt)
{
        switch (keymgmt) {
        case KEY_MGMT_802_1X:
        case KEY_MGMT_802_1X_NO_WPA:
                return IW_AUTH_KEY_MGMT_802_1X;
        case KEY_MGMT_PSK:
                return IW_AUTH_KEY_MGMT_PSK;
#ifdef CONFIG_CCKM
        case KEY_MGMT_CCKM:
                return IW_AUTH_KEY_MGMT_CCKM;
#endif
        default:
                return 0;
        }
}


static int
wpa_driver_rsi_auth_alg_fallback(struct wpa_driver_rsi_data *drv,
                                  struct wpa_driver_associate_params *params)
{
        struct iwreq iwr;
        int ret = 0;

        wpa_printf(MSG_DEBUG, "RSI: Driver did not support "
                   "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        /* Just changing mode, not actual keys */
        iwr.u.encoding.flags = 0;
        iwr.u.encoding.pointer = (caddr_t) NULL;
        iwr.u.encoding.length = 0;

        /*
         * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
         * different things. Here they are used to indicate Open System vs.
         * Shared Key authentication algorithm. However, some drivers may use
         * them to select between open/restricted WEP encrypted (open = allow
         * both unencrypted and encrypted frames; restricted = only allow
         * encrypted frames).
         */

        if (!drv->use_crypt) {
                iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
        } else {
                if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
                        iwr.u.encoding.flags |= IW_ENCODE_OPEN;
                if (params->auth_alg & AUTH_ALG_SHARED_KEY)
                        iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
        }

        if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
                perror("ioctl[SIOCSIWENCODE]");
                ret = -1;
        }

        return ret;
}


int wpa_driver_rsi_associate(void *priv,
                              struct wpa_driver_associate_params *params)
{
        struct wpa_driver_rsi_data *drv = priv;
        int ret = 0;
        int allow_unencrypted_eapol;
        int value;

        wpa_printf(MSG_DEBUG, "%s ", __FUNCTION__);

        /*
         * If the driver did not support SIOCSIWAUTH, fallback to
         * SIOCSIWENCODE here.
         */
        if (drv->auth_alg_fallback &&
            wpa_driver_rsi_auth_alg_fallback(drv, params) < 0)
                ret = -1;

        if (!params->bssid &&
            wpa_driver_rsi_set_bssid(drv, NULL) < 0)
                ret = -1;

        /* TODO: should consider getting wpa version and cipher/key_mgmt suites
         * from configuration, not from here, where only the selected suite is
         * available */
        if (wpa_driver_rsi_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
            < 0)
                ret = -1;
        if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
                value = IW_AUTH_WPA_VERSION_DISABLED;
        else if (params->wpa_ie[0] == WLAN_EID_RSN)
                value = IW_AUTH_WPA_VERSION_WPA2;
        else
                value = IW_AUTH_WPA_VERSION_WPA;
        if (wpa_driver_rsi_set_auth_param(drv,
                                           IW_AUTH_WPA_VERSION, value) < 0)
                ret = -1;
        value = wpa_driver_rsi_cipher2rsi(params->pairwise_suite);
        if (wpa_driver_rsi_set_auth_param(drv,
                                           IW_AUTH_CIPHER_PAIRWISE, value) < 0)
                ret = -1;
        value = wpa_driver_rsi_cipher2rsi(params->group_suite);
        if (wpa_driver_rsi_set_auth_param(drv,
                                           IW_AUTH_CIPHER_GROUP, value) < 0)
                ret = -1;
        value = wpa_driver_rsi_keymgmt2rsi(params->key_mgmt_suite);
        if (wpa_driver_rsi_set_auth_param(drv,
                                           IW_AUTH_KEY_MGMT, value) < 0)
                ret = -1;
        value = params->key_mgmt_suite != KEY_MGMT_NONE ||
                params->pairwise_suite != CIPHER_NONE ||
                params->group_suite != CIPHER_NONE ||
                params->wpa_ie_len;
        if (wpa_driver_rsi_set_auth_param(drv,
                                           IW_AUTH_PRIVACY_INVOKED, value) < 0)
                ret = -1;

        /* Allow unencrypted EAPOL messages even if pairwise keys are set when
         * not using WPA. IEEE 802.1X specifies that these frames are not
         * encrypted, but WPA encrypts them when pairwise keys are in use. */
        if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
            params->key_mgmt_suite == KEY_MGMT_PSK)
                allow_unencrypted_eapol = 0;
        else
                allow_unencrypted_eapol = 1;

        if (wpa_driver_rsi_set_psk(drv, params->psk) < 0)
                ret = -1;
        if (wpa_driver_rsi_set_auth_param(drv,
                                           IW_AUTH_RX_UNENCRYPTED_EAPOL,
                                           allow_unencrypted_eapol) < 0)
                ret = -1;
#ifdef CONFIG_IEEE80211W
        switch (params->mgmt_frame_protection) {
        case NO_MGMT_FRAME_PROTECTION:
                value = IW_AUTH_MFP_DISABLED;
                break;
        case MGMT_FRAME_PROTECTION_OPTIONAL:
                value = IW_AUTH_MFP_OPTIONAL;
                break;
        case MGMT_FRAME_PROTECTION_REQUIRED:
                value = IW_AUTH_MFP_REQUIRED;
                break;
        };
        if (wpa_driver_rsi_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
                ret = -1;
#endif /* CONFIG_IEEE80211W */
        if (params->freq && wpa_driver_rsi_set_freq(drv, params->freq) < 0)
                ret = -1;
        if (wpa_driver_rsi_set_ssid(drv, params->ssid, params->ssid_len) < 0)
                ret = -1;
        if (params->bssid &&
            wpa_driver_rsi_set_bssid(drv, params->bssid) < 0)
                ret = -1;

        return ret;
}


static int wpa_driver_rsi_set_auth_alg(void *priv, int auth_alg)
{
        struct wpa_driver_rsi_data *drv = priv;
        int algs = 0, res;

        if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
                algs |= IW_AUTH_ALG_OPEN_SYSTEM;
        if (auth_alg & AUTH_ALG_SHARED_KEY)
                algs |= IW_AUTH_ALG_SHARED_KEY;
        if (auth_alg & AUTH_ALG_LEAP)
                algs |= IW_AUTH_ALG_LEAP;
        if (algs == 0) {
                /* at least one algorithm should be set */
                algs = IW_AUTH_ALG_OPEN_SYSTEM;
        }

        res = wpa_driver_rsi_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
                                             algs);
        drv->auth_alg_fallback = res == -2;
        return res;
}


/**
 * wpa_driver_rsi_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
 * @priv: Pointer to private rsi data from wpa_driver_rsi_init()
 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
 * Returns: 0 on success, -1 on failure
 */
int wpa_driver_rsi_set_mode(void *priv, int mode)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = -1, flags;
        unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.mode = new_mode;
        if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
                ret = 0;
                goto done;
        }

        if (errno != EBUSY) {
                perror("ioctl[SIOCSIWMODE]");
                goto done;
        }

        /* mac80211 doesn't allow mode changes while the device is up, so if
         * the device isn't in the mode we're about to change to, take device
         * down, try to set the mode again, and bring it back up.
         */
        if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
                perror("ioctl[SIOCGIWMODE]");
                goto done;
        }

        if (iwr.u.mode == new_mode) {
                ret = 0;
                goto done;
        }

        if (wpa_driver_rsi_get_ifflags(drv, &flags) == 0) {
                (void) wpa_driver_rsi_set_ifflags(drv, flags & ~IFF_UP);

                /* Try to set the mode again while the interface is down */
                iwr.u.mode = new_mode;
                if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
                        perror("ioctl[SIOCSIWMODE]");
                else
                        ret = 0;

                /* Ignore return value of get_ifflags to ensure that the device
                 * is always up like it was before this function was called.
                 */
                (void) wpa_driver_rsi_get_ifflags(drv, &flags);
                (void) wpa_driver_rsi_set_ifflags(drv, flags | IFF_UP);
        }

done:
        return ret;
}


static int wpa_driver_rsi_pmksa(struct wpa_driver_rsi_data *drv,
                                 u32 cmd, const u8 *bssid, const u8 *pmkid)
{
        struct iwreq iwr;
        struct iw_pmksa pmksa;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        os_memset(&pmksa, 0, sizeof(pmksa));
        pmksa.cmd = cmd;
        pmksa.bssid.sa_family = ARPHRD_ETHER;
        if (bssid)
                os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
        if (pmkid)
                os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
        iwr.u.data.pointer = (caddr_t) &pmksa;
        iwr.u.data.length = sizeof(pmksa);

        if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
                if (errno != EOPNOTSUPP)
                        perror("ioctl[SIOCSIWPMKSA]");
                ret = -1;
        }

        return ret;
}


static int wpa_driver_rsi_add_pmkid(void *priv, const u8 *bssid,
                                     const u8 *pmkid)
{
        struct wpa_driver_rsi_data *drv = priv;
        return wpa_driver_rsi_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
}


static int wpa_driver_rsi_remove_pmkid(void *priv, const u8 *bssid,
                                         const u8 *pmkid)
{
        struct wpa_driver_rsi_data *drv = priv;
        return wpa_driver_rsi_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
}


static int wpa_driver_rsi_flush_pmkid(void *priv)
{
        struct wpa_driver_rsi_data *drv = priv;
        return wpa_driver_rsi_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
}


int wpa_driver_rsi_get_capa(void *priv, struct wpa_driver_capa *capa)
{
        struct wpa_driver_rsi_data *drv = priv;
        if (!drv->has_capability)
                return -1;
        os_memcpy(capa, &drv->capa, sizeof(*capa));
        return 0;
}


int wpa_driver_rsi_alternative_ifindex(struct wpa_driver_rsi_data *drv,
                                        const char *ifname)
{
        if (ifname == NULL) {
                drv->ifindex2 = -1;
                return 0;
        }

        drv->ifindex2 = if_nametoindex(ifname);
        if (drv->ifindex2 <= 0)
                return -1;

        wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
                   "wireless events", drv->ifindex2, ifname);

        return 0;
}


int wpa_driver_rsi_set_operstate(void *priv, int state)
{
        struct wpa_driver_rsi_data *drv = priv;

        wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
                   __func__, drv->operstate, state, state ? "UP" : "DORMANT");
        drv->operstate = state;
        return wpa_driver_rsi_send_oper_ifla(
                drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
}


int wpa_driver_rsi_get_version(struct wpa_driver_rsi_data *drv)
{
        return drv->we_version_compiled;
}

#ifdef CONFIG_CCKM
int wpa_driver_rsi_reassoc(void *priv, u8 *mic, u8 *rn)
{
        struct wpa_driver_rsi_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;
        u8 buffer[12];

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);

        os_memset(buffer, 0, 12);
        os_memcpy(buffer, rn, 4);
        os_memcpy(&buffer[4], mic, 8);

        iwr.u.data.pointer = (caddr_t) buffer;
        iwr.u.data.length  = 12;
        iwr.u.data.flags = CCKM_REASSOC;

        wpa_hexdump(MSG_DEBUG, "GenIE is", buffer, 12);
        if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
                perror("ioctl[SIOCSIWGENIE]");
                ret = -1;
        }

        return ret;
}
#endif

const struct wpa_driver_ops wpa_driver_rsi_ops = {
        .name = "rsi",
        .desc = "Redpine signals' RS9110-N-11-02/03 modules",
        .get_bssid = wpa_driver_rsi_get_bssid,
        .get_ssid = wpa_driver_rsi_get_ssid,
        .set_wpa = wpa_driver_rsi_set_wpa,
        .set_key = wpa_driver_rsi_set_key,
        .set_countermeasures = wpa_driver_rsi_set_countermeasures,
        .set_drop_unencrypted = wpa_driver_rsi_set_drop_unencrypted,
        .scan = wpa_driver_rsi_scan,
        .get_scan_results2 = wpa_driver_rsi_get_scan_results,
        .deauthenticate = wpa_driver_rsi_deauthenticate,
        .disassociate = wpa_driver_rsi_disassociate,
        .set_mode = wpa_driver_rsi_set_mode,
        .associate = wpa_driver_rsi_associate,
        .set_auth_alg = wpa_driver_rsi_set_auth_alg,
        .init = wpa_driver_rsi_init,
        .deinit = wpa_driver_rsi_deinit,
        .add_pmkid = wpa_driver_rsi_add_pmkid,
        .remove_pmkid = wpa_driver_rsi_remove_pmkid,
        .flush_pmkid = wpa_driver_rsi_flush_pmkid,
        .get_capa = wpa_driver_rsi_get_capa,
        .set_operstate = wpa_driver_rsi_set_operstate,
#ifdef CONFIG_CCKM
        .set_reassoc = wpa_driver_rsi_reassoc,
#endif
};
